baber/WOPTO huggingface dataset:
Patent GB-650721-A (GB)
Title: Improvements in or relating to circuits for protecting amplifying tubes against overloading
IPC: H03F3/22
Filed: 1947-06-24
Abstract: 650,721. Valve amplifying circuits. PHILIPS LAMPS, Ltd. June 24, 1947, No. 16621. Convention date, June 27, 1946. [Classes 40 (v) and 40 (vi)] In order to protect an amplifier, and more especially a push-pull class B amplifier, from overload if the impedance of the anode load becomes unduly small, the drive is compared with the output voltage in an auxiliary valve and is automatically reduced if it is unduly large. In Fig. 1 the first grid of the auxiliary valve 11 is connected to a tertiary winding on the output transformer 5, and the second grid is driven in opposite phase via a condenser 13 connected to the amplifier input. The two voltages are adjusted to balance out in the anode circuit of the valve when the load 8 is normal; with a load of less impedance the drive on the second grid predominates and produces, due to anode rectification, a steady negative potential across condenser 16 which biasses back the amplifier 1, 2. A corresponding bias is not produced when the load impedance increases, the excess drive on the first grid of the valve 11 being limited by grid rectification, which generates a negative bias in resistance 9 and prevents increase of anode current in this valve. The potential developed across condenser 16 may alternatively be applied to reduce the gain of an earlier stage in the amplifier. Grid rectification in the valve 11 may be enhanced by a diode 17; in a modification, Fig. 4 (not shown) which is insensitive to the relative phase of the comparison voltages, one is first rectified by a separate diode and the smoothed D.C. is then used to control the mutual conductance of the auxiliary valve. In other arrangements, Fig. 5 (not shown), one of the voltages is applied via the cathode circuit of the valve 11. In a further arrangement, Fig. 3, a pair of auxiliary valves 11, 11<SP>1</SP> is provided operating in pushpull, and excess of drive results in an alternating voltage in the anode circuits which is applied to the amplifier input as negative feed-back, via a transformer 18.
Patent GB-240927-A (GB)
Title: Improvements relating to electrically driven high speed spindles applicable for use with woodworking machines
IPC: B27C1/02
Filed: 1924-07-11
Abstract: 240,927. Ransome & Co., Ltd., A., and Robinson, P. S. July 11, 1924. Driving-devices; tools.-An electric motor for driving a woodworking machine is mounted in the housing which in ordinary practice holds the bearing for the machine spindle. A motor may be secured to each end of the spindle. The motor casing C has an extension Q secured in the split housing R and carrying a sleeve G attached to the rotor in ball-bearings 0, O<1>. The spindle B of the woodworking machine is attached to the sleeve G by a split tapered bush F adjusted by means of a hollow screw K. Through the screw K passes a screw N against which abuts the end of the spindle B.
Patent GB-910685-A (GB)
Title: Improvements in or relating to liquid dispensers
IPC: B67D1/04
Filed: 1959-05-15
Abstract: 910,685. Forcing liquids by gaseous pressure. WASER, H., FEHR, E., and BILL, H. May 15, 1959 [May 16, 1958], No. 16738/59. Class 102(2). A liquid dispenser comprises a container 3 having inlet connections 14, 18 connected respectively to a source of liquid and gas under pressure and an outlet 16 which leads to a manually operated tap. A vent pipe 8 having a nozzle 8a at the top of the container is connected by passages 7 to the atmosphere and a valve 11 is provided for the nozzle on an arm 10 pivoted at 9 and having a cap like member 12 at its other end which is located over the opening of the liquid inlet pipe 13 which leads from the liquid inlet 14. The liquid and gas inlets are provided with non-return valves 15, 19 respectively and the gas inlet is controlled by a valve 23 spring loaded to its closed position and opened by a lever 27 which engages a ring 29 of a rod 30 secured to a float 32. The float 32 is formed of two semi-circular hollow members open at the bottom. In operation assuming the container is filled with gas impregnated liquid the vent valve is closed and since the cap 12 is not a tight fit in the pipe 13 the pressure in the . container and this pipe are equal. When the tap is opened the gas forces the liquid through a throttle 17 to the outlet until the pressure reduces and the liquid acts to move the cap 12 and open the vent valve 8a. Liquid flows into the container raising the float 32 until the valve 23 opens. Gas then enters the container and the increase in pressure closes the cap 12 on the liquid inlet and the vent valve. The container is thus continuously replenished with gas and liquid as discharging of the liquid takes place.
Patent GB-190438-A (GB)
Title: Improvements in holders and receptacles for ignitable pellets
IPC: F23Q2/24
Filed: 1922-06-16
Abstract: 190,438. Grossman, H. Dec. 17, 1921, [Convention date]. Addition to 182,453. Contents, delivering.-A modification of the pellet-gripping device of the parent case, consists of two relatively-movable parts connected by a spring which causes the jaws of the device to grip the pellets. The gripping device consists of a sleeve 7 within which slides a member 8, the two members terminating in jaws 10, 11 which are forced open so as to admit a pellet in opposition to a spring 9 by pressure upon the upper end of the member 8. Positioning of the pellets for withdrawal is obtained by providing a spring plate 5 at the bottom of the receptacle 1, which in conjunction with a partition 3 normally prevents access of the pellets to the passage into which the gripping device is inserted. Insertion of the gripping device displaces the plate 5, thus admitting a single pellet. In a modification, Fig. 4, the gripping device comprises tongs 18 slidable in a sleeve 17, the gripping jaws being forced open to admit a pellet on displacement of the tongs in opposition to a spring 19 by a bridge piece 21 provided on the sleeve 17.
Patent GB-729149-A (GB)
Title: Electrosensitive recording and duplicating blank
IPC: B41M5/04
Filed: 1952-07-04
Abstract: 729,149. Coated conducting paper. CREED & CO., Ltd. July 4, 1952 [July 11, 1951], No. 16820/52. Classes 96 and 140. [Also in Groups XVI, XIX, XXII and XL (b)] An electro-sensitive recording blank comprises an electrically conducting sheet having a surface covered with a dry water-soluble dye dispersed in a binder which is a non-solvent for the dye and the dye layer is covered with an adhesive thin layer of finely-divided carbon dispersed in a binder which is a non-solvent for the dye, the recording operation being effective to remove the carbon layer locally to expose the dye layer. The electrically-conducting sheet, indicated at 11, may be a thin sheet of paper provided with a conductive layer or impregnated with carbon, or metallic particles. The dye forming the coating 12 is, for example, methyl violet with ethyl cellulose or ester gum dissolved in a volatile hydrocarbon or in a halogenated hydrocarbon. The film 14 comprises carbon black dispersed in a binder which may be the same as that used for the dye layer. The blank after subjection to the recording operation is used in a hectograph process to obtain a number of copies of the recorded matter. Specification 660,029 and U.S.A. Specifications 2,229,091 and 2,255,868 are referred to. Reference has been directed by the Comptroller to Specification 615,744.
Patent GB-273697-A (GB)
Title: Improvements in or relating to apparatus for interchanging power between electrical circuits
IPC: H02M7/00
Filed: 1927-06-24
Abstract: 273,697. British Thomson-Houston Co., Ltd., (Assignees of Prince, 'D. C.). June 29, 1926, [Convention date]. Vapour apparatus, arrangements of. - Vapour electric apparatus for interconnecting a DC circuit 26 with an AC circuit 27, is arranged so that it is not necessary to exchange the connections of the apparatus when the direction of power transmission is reversed. The apparatus comprises three mercury electrodes 4, 5, 6, excited by electrodes 7, 8, 9 and each capable of functioning as an anode or cathode, the flow of current being controlled by grids 18, 19 supplied through a transformer 15 and phase leading device 21. A condenser 25 which discharges through a resistance 24 at the moment that the transformer 15 is passing through zero potential, ensures that at the moment the mid point of the transformer secondary and thererfore both grids 18, 19 are maintained negative. This in turn, ensures that the discharge between one pair of electrodes 4, 5 or 5, 6 dies down before a discharge starts between the other pairs. Therefore short circuits are avoided. As the electrodes are of similar nature, a discharge can pass either way, and therefore the direction of power interchange can reverse without any connections being altered, although an adjustment of the device 21 can be made to give a greater phase lead to the grids 18, 19 when power is transmitted from circuit 26 to circuit 27 than when power is transmitted in the reverse direction.
Patent GB-1509222-A (GB)
Title: Water soluble agents having mitogenic properties obtained from nocardia cells and processes for the preparation thereof
IPC: A61K35/74
Filed: 1975-04-23
Abstract: 1509222 Mitogenic agents from Nocardiae cells AGENCE NATIONALE DE VALORISATION DE LA RECHERCHE 23 April 1975 [25 April 1974] 16877/75 Heading A5B A process for obtaining a mitogenic agent comprises the steps of cultivating Nocardiae cells, collecting the cells, subjecting them to lysis or other treatment for rupturing the integrity of their walls, discarding the solid residue and collecting 'the aqueous fraction, causing the peptidoglycane fragments contained in this aqueous fraction to be separated therefrom and recovering the remaining fraction containing the mitogenic agent. The agent may be used in the form of a composition in association with a suitable vehicle e.g. a sterile injectable liquid.
Patent GB-233200-A (GB)
Title: Improvements in apparatus for separating coke from clinker, breeze, and the like
IPC: B03B5/28
Filed: 1924-07-15
Abstract: 233,200. Rigby, J. July 15, 1924. Stationary - vessel washing - apparatus; wet-separating.-In an apparatus for separating coke from clinker, breeze, and the like, the material to be treated is fed to the upper compartment E of a water tank D, the heavier constituents falling between plates G, H to the bottom of the tank and being removed by a bucket elevator N. The lighter coke floats and is picked up by a bucket wheel B and discharged to a lateral shoot C. To increase the density of the water if required, clay may be supplied to a compartment L, cutters I being attached to the wheel B for cutting up the clay and mixing it with the water.
Patent GB-773959-A (GB)
Title: Phase sense sensitive circuits
IPC: G01R25/00
Filed: 1953-06-11
Abstract: 773,959. Electric control systems. BENDIX AVIATION CORPORATION. June 11 1953 [Aug. 15, 1952], No. 16964/55. Divided out of 773,958. Drawings to Specification. Class 40 (1). [Also in Group XXXV] The detailed description is identical with that of Specification 773,958 but the claims are directed to features of the phase discriminator circuit.
Patent GB-1040651-A (GB)
Title: Improvements in or relating to automatic switching systems
Inventor: LEFTWICH RAYMOND
IPC: H04Q3/00
Filed: 1964-04-24
Abstract: 1,040,651. Automatic exchange systems. GENERAL ELECTRIC CO. Ltd. April 23, 1965 [April 24, 1964], No. 17080/64. Heading H4K. In a multi-stage relay cross-point system in which marking circuits 68, 69, 70 are provided for operating relays A, B, C of successive stages, such circuits or some of them include Zener diodes 59, 63, Fig. 5, or 76, 77, 78, Fig. 6, in order to give each relay an adequate operating potential. The relays which may be of the reed type operate in the order C, B, A and ultimately lock in series.
Patent GB-579988-A (GB)
Title: Improvements relating to velocity-modulated electron discharge devices
IPC: H01J25/00
Filed: 1943-10-18
Abstract: 579,988. Discharge apparatus. FERRANTI, Ltd., WHITMORE, E. J., and MAYES, W. R. J. Oct. 18, 1943, Nos. 17138/43 and 19895/44. [Classes 39 (i) and 40 (v)] In electric discharge apparatus an electrode is secured in accurate adjustment with another apertured electrode by securing the former in an insulating member 5 which fits into a locating recess in the apertured electrode. In a velocity modulation apparatus in which an electron stream from a gun 20 passes through a resonator 17 and is reflected back through the resonator by an electrode 2, the latter is mounted in this manner. The cup 5 engages with a shoulder in the apertured electrode 12 forming one end of the resonator. The method of positioning may also be used in connection with a safety device used in connection with a transmission and reception circuit. In this a resonator 24 receives energy from the circuit through windows 27 from wave guides. If the energy in the circuit becomes excessive, a spark is set up across the resonator. An electrode 23 initiates this spark. This is mounted as before in an insulating member 5 engaging in a recess in the apertured side 34 of the resonator. The latter has a diaphragm 37 adjusting by a screw 39<1> for tuning purposes. The apparatus may have a filling of water vapour alone or mixed with inert gas.
Patent GB-995997-A (GB)
Title: Improvements in or relating to clothes hangers
IPC: A47G25/26
Filed: 1964-04-24
Abstract: 995,997. Garment hangers. J. O. FARRER. (I. Wagner). April 24, 1964, No. 17145/64. Heading A4U. A garment hanger includes a support 1 formed from a profiled steel plate of part semi-circular section and a coating of plastic such as polyvinyl chloride. Projections 5 are produced by pressing projections in the steel plate.
Patent GB-1025723-A (GB)
Title: Improvements in or relating to electrical devices having hermetically sealed envelopes
Inventor: RIGDEN SYDNEY ALFRED RICHARD
IPC: C04B37/02
Filed: 1963-05-01
Abstract: 1,025,723. Electric discharge tubes. GENERAL ELECTRIC CO. Ltd. Feb. 26, 1964 [May 1, 1963], No. 17184/63. Heading H1D. In an electrical device having an hermetically sealed envelope, e.g. an incandescent lamp containing iodine and rare gas, or a metal vapour discharge lamp, at least the greater part of the wall of the envelope is provided by a single crystal of one or more refractory oxides. In particular, a synthetic alumina (corundum or sapphire) crystal may be ground to the shape of a rod and bored to form a tube having a length of 60 mm., an internal diameter of 6 mm. and a wall thickness of 0À8 mm. This tube may form a discharge lamp envelope, its ends being closed by electrode-supporting niobium caps sealed thereto by calcium aluminate. The discharge lamp may have a filling of sodium and argon at 20 mm. of Hg pressure, and may be mounted in a cylindrical glass outer jacket.
Patent GB-260525-A (GB)
Title: Improvements in pedals for bicycles and the like
IPC: B62M3/08
Filed: 1926-07-09
Abstract: .260,525. Leick, G. July 9, 1926. Pedals having U-shaped channels to hold the treads are constructed with two pairs of tongues bent inwardly out of the two end plates and supporting the bottoms of the channels. The end plates 1, 2, Figs. 2 and 3, are secured in the usual way to a central tube and each is formed with two pairs of bent tongues 4 adapted to be secured by bolts 8 and distance pieces 7 to the bottoms 5 of channel members 6 carrying rubber treads 10. In a modification, the two sides of the channels are dovetail shaped to grip the rubber treads. In a further modification, Fig. 7, the channels 6 are formed with subsidiary channels 5<a> which abut and render distance pieces unnecessary.
Patent GB-313055-A (GB)
Title: Improvements in and relating to electric condensers
IPC: H01G13/00
Filed: 1929-06-05
Abstract: 313,055. Elektrizitõts -Akt. - Ges. Hydrawerk. June 5, 1928, [Convention date]. Void [Published under Sect. 91 of the Acts]. Condensers which are impregnated with an additional dielectric of high value and cast in an enclosing mass, are provided with a protective layer between the body and the mass to prevent mixing of the additional dielectric and the mass during manufacture or in operation. This intermediate material preferably has a higher melting- point than that of the mass, and also serves as a moisture-proof coating. When the impregnating material is paraffin or oil, the material may be tar or pitch of high melting point.
Patent GB-630523-A (GB)
Title: Improvements in and relating to friction clutches
IPC: F16D25/04
Filed: 1947-07-01
Abstract: 630,523. Friction clutches. NATIONAL SUPPLY EXPORT CORPORATION, and OIL WELL ENGINEERING CO., Ltd. July 1, 1947, No. 17349. Convention date, Sept. 30, 1946. [Class 80 (ii)] A fluid-pressure actuated friction-clutch, particularly for use in oilfield drilling machinery, comprises a rotatable housing 19, keyed by its hub 16 to a driving shaft 10, and surrounding a ring-element 44 integral with a coaxial driven sprocket 46, rotatable on the shaft 10 and having splined on it a friction disc 41, which is clamped between a pair of discs 24, 25, slidable axially on housing-bolts 26, by fluid-pressure acting on an annular piston 34, sealed by diaphragms 30, 31 in a bolted chamber 28, which, together with the piston is carried externally of the housing 19, the adjacent clutch disc 25 having projections 39 bolted to the piston and passing freely through housing-holes 20 to transmit piston-thrust for pressing the clutch-discs together against the opposite wall of the housing. Pressure fluid (e.g. air) reaches the piston-chamber 28 through a stationary glanded fitting 77, a shaft duct 66 and a detachable pipe 73, Fig. 2, having banjo-ends seated, with the interposition of deformable rings 63, against flats on the shaft and a chamber inlet-lug 70 by pressurescrews 65, 72. Specification 619,340 is referred to.
Patent GB-758575-A (GB)
Title: Improvements in variable speed power transmissions
IPC: F16H3/44
Filed: 1954-06-14
Abstract: 758,575. Variable speed gearing. NIT-RACAM CORPORATION. June 14, 1954 [July 1, 1953], No. 17387/54. Class 80(2) Variable ratio gearing comprises a driving shaft 36, Fig. 1, integral with a sun gear 38 meshing planet gears 44, rotatable on a carrier 46 and meshing an internally toothed annulus 56 fast in a casing 18 which can rotate. The planet carrier 46 is secured to a rotatable member 60, 62, Fig. 8, which is the driven member of the gear. The rotatable member 60, 62 has side plates 72, 74 with holes 82 for a shaft 86 supporting a rotor 78, Fig. 5, carrying in apertures 96 four radially movable plungers 100, Fig. 7. Each radially movable plunger has a ball head 110 and a rod 122 perpendicular to its axis with rollers 124 at each end. Eccentric cam grooves 126, Fig. 8, in the rotatable member 60, 62, are engaged by the rollers 124. The ball heads 110 on the radially movable plungers engage in spiral grooves 132 formed in a spherically surfaced part 130 of the casing 18. When the driving shaft 36 rotates and no load is placed on the driven shaft 62, the whole gear, including the casing 18, rotates solidly to give a direct drive. If a load is placed upon the driven shaft, the resistance causes the plungers 100 to slide in the spiral grooves 132, thus turning the rotor 78 about the shaft 86, and the friction between the ball heads 110 and the grooves results in a reduced ratio drive. The cam grooves 126 cause the plungers 100 to be moved in and out of the spiral grooves 132 as the rotor 78 turns. Eccentric cams 144, Fig. 5, on the sides of the rotor 78, are engaged by plungers 156 on pistons 154 which pump lubricating oil from the sump 166 through adjustably controlled orifices 174 to restrict the speed at which the rotor 78 turns.
Patent GB-1378618-A (GB)
Title: N-2,4-dihydroxybenzoyl-4-aminosalicyclic acid
IPC: A61K/
Filed: 1973-04-11
Abstract: 1378618 N-(2,4-Dihydroxybenzoyl)-4-aminosalicylic acid and derivatives thereof ZAIDAN HOJIN BISEIBUTSU KAGAKU KENKYU KAI 11 April 1973 [15 April 1972] 17400/73 Heading C2C The invention comprises N-(2,4-dihydroxybenzoyl)-4-amino-salicylic acid having the formula and the non-toxic pharmaceutically acceptable salts thereof, and the masked forms thereof having the formula wherein R 1  is C 1  to C 4  alkanoyl, aroyl, C 1  to C 4  carboalkoxy, or carbobenzoxy and R 2  is hydrogen, C 1  to C 4  alkanoyl, aroyl, C 1  to C 4  carboalkoxy or carbobenzoxy. They may be prepared by condensing a beta-resorcylic acid of the formula where R and R<SP>1</SP> are each hydrogen or a hydroxymasking group and X is hydroxyl or halogen, with a p-aminosalicylic acid of the formula wherein Y is hydrogen or a physiologically acceptable cation. The compounds of the invention exhibit activity against inflammation, pain, pyrexia, allergic diseases, e.g. asthma and nettle rash, dermatological diseases, mastocytosis, hyperacidity, rheumatism, arthritis and hyperuricacidemias and may be administered orally, topically, enterally or parenterally in admixture with pharmaceutical diluents or carriers.
Patent GB-624552-A (GB)
Title: Improvements in or relating to metal degreasing
IPC: C23G1/14
Filed: 1947-07-02
Abstract: 624,552. Degreasing metals. BOOTH, W. E., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. July 2, 1947, No. 17421. [Class 82(ii)] In a process and apparatus for degreasing metal articles by spraying with an alkaline solution in the presence of a wetting agent, a horizontal hot surface 10- e.g. a flat closely coiled steam or hot water pipe-is disposed below the articles and above the surface of the used solution which collects in a sump 7, in order to prevent excessive foaming. In the arrangement shown, the metal articles, conveyed by a belt 1 through successive spraying chambers-3 for the alkaline solution treatment, 4 for water rinsing, and 5 for a final water wash-are sprayed from jets 6 supplied from the sump 7 by a pump 8 and arranged around the walls. A closely coiled steam-heated pipe 10 substantially covering the surface of this collected used solution 7 and adjustable in height, is placed below the belt 1, whereby sprayed solution can reach the sump and foam, on contacting said hot pipe, is suppressed. A further heated pipe 11 may also be provided in the chamber 5. The method is said to be particularly applicable to degreasing aluminium and tin ; the alkaline solution containing about 3 per cent of solute which may comprise caustic soda, sodium carbonate, sodium silicate and sodium phosphate, the wetting agent being e.g. a sulphated or sulphonated fatty alcohol.